TRO 1st ed AND Chang, 9th Edition, Chapter 10, Worksheet #1
Answers:
1. In each case, predict (a) the approximate bond angle(s), (b) the hybridization around the
underlined atom. (Note: It is helpful to first sketch the Lewis stucture!)
Molecule or Ion
(1) OF2
(2) H2CO
(3) NO2+
(4) BF3
(5) SbF5
(a) No. of valence e - ‘s
(b) Lewis structure
20
12
16
24
40
(c) Approximate bond
angle(s)
(d) Hybridization
109.5o
120o
180o
120o
90o, 120o
sp3
sp2
sp
sp2
sp3d
(e) Polar or non-polar
molecule?
(f) Geometry name
polar
polar
non-polar
non-polar
bent
trigonal planar
Ion: Not
applicable
linear
trigonal planar
trigonal
bypyramidal
______________________________________________________________________________
2. For each of the molecules below fill in the indicated items in the chart. The central atoms are
underlined.
Molecule
(4) CH2Cl2
(1) SO2
(2) HBF2
(3) XeF4
(5) NF3
(a) No. of valence e - ‘s
18
18
36
20
26
(c) Approximate bond
angle(s)
(d) Hybridization
120o
120o
90o
109.5o
109.5o
sp2
sp2
sp3d2
sp3
sp3
(e) Polar or non-polar
molecule?
(f) Geometry name
polar
polar
non-polar
polar
polar
bent
trigonal planar
square planar
tetrahedral
trigonal
pyramidal
(b) Lewis structure
____________________________________________________________________________
3. Predict (a) the approximate bond angle, (b) the hybridization around the indicated atoms (the
atoms to which the arrows are drawn in the structures below). Write your answers near the
corresponding labels (1 to 5) in the drawings. (Note: the lone pairs on the F atoms are omitted.)
H
H
N
1
F
S
F
F
F
2
F
F
Br
4
C
N
F
3
C
N
5
F
F
C
H
C
C
N
N
H
page 1
O
H
TRO 1st ed AND Chang, 9th Edition, Chapter 10, Worksheet #1
(1) 90o, 120o; sp3d
(2) 90o; sp3d2
(3) 109.5o; sp3
page 2
(4) 120o; sp2
(5) 109.5o; sp3